# require 'Math'
# require 'trig.rb'
# require 'moral'
module A
   def a1
   end
   def a2
   end
end
module B
   def b1
   end
   def b2
   end
end
module Hav
    def run 
        puts "run " + Math::PI.to_s
    end
    def jump
        puts "jump " + Trig.sin(Trig::PI/4)
    end
end
class People
    # include Hav
    include A
    include B
    include Hav
    def outside 
        puts "head and body and foot!"
    end
end

people = People.new
people.outside
people.run
people.jump
